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- W3105157061 endingPage "110760" @default.
- W3105157061 startingPage "110760" @default.
- W3105157061 abstract "Flavonols, a class of flavonoids, accumulate as protective agents in response to various stresses. Among various environmental stimuli, light is one of the factors regulating flavonol production. MYB12/11/111, members of the R2R3 MYBs family, regulates spatio-temporal flavonol accumulation in Arabidopsis. Although various studies indicate at the involvement of an E3 ubiquitin ligase CONSTITUTIVE PHOTOMORPHOGENIC 1 (COP1) and ELONGATED HYPOCOTYL 5 (HY5) in flavonoid biosynthesis in response to UV-B, the regulatory roles of these components under visible light are yet to be investigated. Here, we demonstrate that flavonol accumulation in Arabidopsis is light-regulated. Furthermore, our analysis suggests that MYB12 is a HY5-dependent light-inducible gene and plays a key role in the activation of the flavonol biosynthesis in response to light. Our results indicate the involvement of COP1 in the dark-dependent repression of MYB12 expression and flavonol accumulation. In addition, results also suggest that the effect of COP1 on MYB12 is indirect and is mediated through HY5, a direct transcriptional activator of the MYB12. Together these findings indicate that COP1 acts as a master negative regulator of flavonol biosynthesis in the dark." @default.
- W3105157061 created "2020-11-23" @default.
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- W3105157061 date "2021-02-01" @default.
- W3105157061 modified "2023-10-01" @default.
- W3105157061 title "COP1 mediates light-dependent regulation of flavonol biosynthesis through HY5 in Arabidopsis" @default.
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- W3105157061 doi "https://doi.org/10.1016/j.plantsci.2020.110760" @default.
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